campana



9 1 w t 1 w a W S s I a W Y M mm may m N$ E 7 m2 W M" c 1 A A M a G1, NW 1 T1 V: AM no NW1 M, mum in M a Aw c m cm HA Hm 0 'Mn RD. E F .s N A R m Aug 25, 1925 Aug. 25; 1925 1,551,009

F. (3. CAMPANA TRANSFER MECHANISM FOR CALICULA TING MACHINES Original Fil fl Mar h 1, 1921 2 sheets sheet -2 INVENTOR J zwfw BY \L Q [OMQ' W W ATTORNEYS Patented Aug. 25, 1925.

UNITED STATES FRANCISCO CAMPUS CAMPAlIfA, OF HAMBURG, GERMANY.

T 0 all whom it may concern:

Be it known that I, FRANCISCO CAMros CAMPAfIA, residing at Hamburg, Germany, have invented certain new and useful Improvements in Transfer Mechanism for Calculating Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to transfer mechanisms and may be used in any type of calculating machines, totalizers or registers in which the addition and subtraction wheels and their axles operate successively and not simultaneously. The invention is not applicable to machines in which the addition and subtraction wheels have a common axle.

The invention will be further described and illustrated in connection with the draw ings in which:

Figure 1 is a side elevation of one of the geared adding dials showing the internal gear and pinion.

Figure 2 is an end view of a pair of geared adding dials with the transfer mechanism between the dials.

Figure 3 is a side elevation of a geared adding dial showing the opposite side from Figure 1.

Figures 1, 5 and 6 show the three different positions which the transfer apparatus can occupy.

Figure 7 is a diagrammatic representation showing the operation of the transfer mechanism.

A series of geared adding dials 1 is provided with individual axles and means for throwing the gears successively into mesh with the gears of the calculating machine the order of meshing beginning with the units dial and followed successively by the ten, hundred, thousand etc. The axles of the individual dials are mounted in the pivotal mountings lever 2 which are capable of rotation about the axle 3. The movement of levers 2 whereby the gears are thrown into mesh with the calculating machine gears is carried out by means of cams 15 on the shaft 16. A pair of dials are illustrated in the drawings but it will be readily understood that in an actual machine a series of dials will be used with cams staggered on the shaft 16 so that the units dial is first brought into mesh and the dials of higher order in succession as described above.

TRANSFER MECHANISM FOR CALCULATING MACHINES.

Original application filed March 1, 1921, Serial No. 448,898.

Divided and. this application filed. March 17,

Serial No. 16,106.

On one side the geared dial carries a plate with a series of radial slots 5 having a circular curvature. The opposite side of the dial carries an internal gear ll meshing with a pinion 6, the ratio between the teeth of the internal gear and the pinion being equal to the numbers of numeral sets on the dial. In the dial illustrated in Figure 1, four sets of ten numerals appear on the dial and accordingly the internal gear 14 is provided with four times as many teeth as the pinion 6, the latter making one revolution for each set of numerals on the dial. The finger 7 is rigidly keyed to the pinion 6 and both turn on an axle mounted in the mounting 2 (see Figure 1). The lever 8 turns about the pivot 9 which is also mount ed in the support 2 as is shown in Figure 1. Opposite to the pivot 9 the lever 8 carries the pin 10 and projects from some distance beyond the mountings 2 as is shown in Fig ure 2. The plate 11 which is rigidly attached at the pivot 9 with the lever 8 carries three recesses or notches engaging with the disc or roller 12 on the lever 13 which in turn is pivoted in the mounting 2. The lever and disc thus serve as a lock for the lever 8 preventing an overthrow due to its momentum when the calculating machine is operated at high speed. The lever 8 is also provided with a tooth 17 which engages the pointed finger 7 at an angle in order to prevent binding.

Between each pair of adding dials is placed the rigidly supported hook or guide t through which the pin 10 projects and en gages with the slot 5 of the dial of the next higher order when the latter is brought into engagement with the gears of the calculating machine.

The lever 8 can occupy three positions, I, II, and III, as shown respectively in Figure 4, Figure 5 and Figure 6. The plate 11 looks the lever in either of these three positions and prevents any tendency for the lever to drop into the adding position due to its own weight. Position I corre sponds to the case where there is no transfer either in addition or subtraction. Position II corresponds to the transfer or carrying of a digit in addition and position III the borrowing of a digit in subtraction.

The operation of transfer is as follows: When a dial has not passed the zero mark either in addition or subtraction the lever 8 is in position I (Fig. 4). As the shaft 16 continues to turn and the cam 15 corrc sponding to the units dial moves the dial out of mesh with the calculator gear the pin 10 engages with one of the slots on the dial of the next higher order and moves from position I to position IV as indicated in a diagram in Figure 7. Since, however, as is shown in Fig. 3, the slot 5 forms an arc of a. circle the center of which coincides with the center of the axle 3, around which the support 2 rotates, it is obvious that the pin will exert no forces on the sides of the slot 5 and will not move the dial of nexthigher order during its passage through the slot. The cam of the dial of next higher order then comes into action and throws this dial into mesh with the calculating wheel and thereby moves the slot engaging with the pin 10 past the latter so that the dial of next higher order can turn freely on its axle.

IVhen in the case of addition a dial passes from 9 to zero finger 7 moves the lever 8 into position II (Fig. 5). On throwing the units dial out of mesh the pin 10 enters one of the slots 5 of the dial of next higher order and also bears against the support t having a curved edge 0Jy and the pin traverses the path from position II to position IV as shown in Figure 7 thereby advancing the dial of next higher order by one tooth.

During the operation of subtraction when the unit dial passes from zero to 9 the finger 7 move the lever S into position III (Fig. 6). Then when the dial is thrown out of mesh by cam 15 the pin 10 engages with a slot in the dial of next higher order and also bears against the edge of the upper portion of the support or guide 4 and is forced to move downward along the curve of this edge moving from position III to position IV in the diagram in Figure 7. As a result the dial of the next higher order is moved backward one tooth.

The mechanism of the calculator wheels and the design of the calculating mechanism itself forms no part of the present invention and the present transfer mechanism can be applied to any suitable form of calculating machine such as for example, the account calculating machine described in my 00- pending application Ser. No. 448,898 filed March 1, 1921.

A spring ratchet 18 preferably incorporated in the present device in order to prevent over-running of the calculating wheels due to their own moinentrun. It should be understood that the invention is not limited to the specific structure of this ratchet and any suitable device performing the same function may be used where it is desirable to prevent the overthrowing of the adding dial.

As will be seen the transfer mechanism of the present invention constitutes a simple and effective means for bringing about the transfer of units in subtraction and addition when used with calculating machines or registers having dials which successively en gage the gears of the machine. The inven tion has been described in connection with the specific construction shown. in the drawing but it should be understood that the invention is not limited to the exact features therein set forth and the structure of the individual elements may be varied within the scope of the appended claims.

The present application is a division of my application Serial No. l i-8,898 filed March 1, 1921.

I claim:

1. In a calculating machine a transfer mechanism comprising geared adding dials journalled in individually pivotable mountings, means for successively meshing the geared adding dials with the gears of the calculating machine, curved radial slots on one side of each dial, a lever and pin on the other side of the dial capable of assuming three positions, means for moving the lever and pin from the neutral position to the adding position on the passage of the dial from 9 to Zero, means for moving the lever and pin to the borrowing position on the passage of the dial from zero to 9, the pin engaging with one of the curved slots of the dial of next higher order on throwing the first dial out of mesh, hooked fixed guides between the dials, the curved edges of the hooks engaging with the pin in its carrying and borrowing position but not engaging with the pin in its neutral position whereby the pin is forced to follow the curve of the guide when in borrowing or carrying position and thereby advances or retards the dial of next higher order by a single tooth.

2. In a calculating machine the transfer mechanism comprising a series of geared adding dials mounted in individual pivoted supports curved radial slots on one side of the dials, the slots being the form of arcs of circles the radius of curvature being equal to the distance from the pivot of the mountings to the curved slot when the slot is perpendicular to a line drawn from the center of the slot to the pivot of the mounting, an internal gear on the other side of each dial, a pinion mounted in the pivoted individual mounting and meshing with the internal gear the ratio of the number of teeth in the internal gear to the number of teeth in the pinion being equal to the number of sets of ten digits around the circumference of the dial, whereby the pinion performs one revolution for a rotation of the dial corresponding to ten digits, a. finger keyed to said pinion, a lever pivoted in the individual mounting and adapted to be engaged by the finger Whenever the zero digit is passed on the dial, a pin in the end of said lever extending away from and at right angles to the geared dial and adapted to engage with the slot on the dial of next higher order When the first dial is thrown out of mesh, a fixed curved guide through which the pin projects and which does not contact with pin in its neutral position but does contact With the pin 10 when the lever has been actuated by the fin ger either during addition or subtraction whereby the pin is forced to describe a curve along the edge of the guide thereby advancing or retarding the dial of next higher order by one digit but being without effect in the neutral position.

In testimony whereof I affix my signature.

FRANCISCO GAMPOS GAMPAK A. 

